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Finding the Fourth Proportional to 1,772.84, 2,656.86 and 905.96

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Solution

The fourth proportional to 1,772.84, 2,656.86 and 905.96 is: 1,357.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,772.84 : 2,656.86 = 905.96 : x
  2. Step 2: Convert to fraction form
    1,772.84/2,656.86 = 905.96/x
  3. Step 3: Cross multiply
    1,772.84x = 2,656.86 × 905.96
  4. Step 4: Simplify right side
    1,772.84x = 2,407,008.89
  5. Step 5: Solve for x
    x = 2,407,008.89/1,772.84
  6. Step 6: Final answer
    x = 1,357.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.